the compiler (I am using gcc btw), produced one warning saying that a pointer from integer was made without a necessary typecast. (shamrock warned me of this, so this gcc output was probably expected).
I tried this
and found the program compiled fine, but at runtime I got a segmentation fault error. I also found that in the first code segment, if you ignore the compiler warning and run the program straight, you get the same run-time error.
As pointers are meant to be assigned to memory locations (and point to values), with respect to this basic understanding and the fact that ASCII characters have memory addresses, aren't both code segments technically correct ??
where is addresses(what kind of memory) like this one "df605d50".
I want to print address of locan variable:
printf("&i - %p", &i);
and I have
&i - df605d50. (0 Replies)
i know it's out there, but I cannot remember how to check if a given ascii character string contains all digits or not ... any ideas?
ie...function("123") --> OK
function("NOT_A_NUMBER") --> returns error
thanks!! (2 Replies)
Hello,
Is there any UNIX utility/command/executable that will convert mutlibyte characters to standard single byte ASCII characters in a given file?
and
Is there any UNIX utility/command/executable that will recognize multibyte characters in a given file name?
The typical multibyte... (8 Replies)
you have three variables of type char, int and float in continous memory locations. How do you print the contents of each of these.???
Thanks in advance. (0 Replies)
Hi gurus,
I have a file in unix with ascii values. I need to convert all the ascii values in the file to ascii characters. File contains nearly 20000 records with ascii values. (10 Replies)
I am having a file(1234.txt) downloaded from windows server (in Ascii format).However when i ftp this file to Unix server and try to work with it..i am unable to do anything.When i try to open the file using vi editor the file opens in the following format ...
@
@
@
@
@
@
@
@... (4 Replies)
Hi,
I have a file having following content.
<sip:9376507346@97.208.31.7:51088
<sip:9907472291@97.208.31.7:51208
<sip:8103742422@97.208.31.7:51024
<sip:9579892841@97.208.31.7:51080
<sip:9370904222@97.208.31.7:51104
<sip:9327665215@97.208.31.7:51104
<sip:9098364262@97.208.31.7:51024... (2 Replies)
Hi,
I have many text files which contain some non-ASCII characters. I attach the screenshots of one of the files for people to have a look at. The issue is even after issuing the non-ASCII removal commands one of the characters does not go away. The character that goes away is the black one with a... (2 Replies)
Hi,
I'm writing a BBS telnet program. I'm having issues with it not displaying lower ASCII characters. For example, instead of displaying the "smiley face" character (Ctrl-B), it displays ^B. Is this because i'm using Ncurses? If so, is there any way around this?
Thanks. (3 Replies)
Discussion started by: ignatius
3 Replies
LEARN ABOUT SUSE
edata
END(3) Linux Programmer's Manual END(3)NAME
etext, edata, end - end of program segments
SYNOPSIS
extern etext;
extern edata;
extern end;
DESCRIPTION
The addresses of these symbols indicate the end of various program segments:
etext This is the first address past the end of the text segment (the program code).
edata This is the first address past the end of the initialized data segment.
end This is the first address past the end of the uninitialized data segment (also known as the BSS segment).
CONFORMING TO
Although these symbols have long been provided on most Unix systems, they are not standardized; use with caution.
NOTES
The program must explicitly declare these symbols; they are not defined in any header file.
On some systems the names of these symbols are preceded by underscores, thus: _etext, _edata, and _end. These symbols are also defined for
programs compiled on Linux.
At the start of program execution, the program break will be somewhere near &end (perhaps at the start of the following page). However,
the break will change as memory is allocated via brk(2) or malloc(3). Use sbrk(2) with an argument of zero to find the current value of
the program break.
EXAMPLE
When run, the program below produces output such as the following:
$ ./a.out
First address past:
program text (etext) 0x8048568
initialized data (edata) 0x804a01c
uninitialized data (end) 0x804a024
Program source
#include <stdio.h>
#include <stdlib.h>
extern char etext, edata, end; /* The symbols must have some type,
or "gcc -Wall" complains */
int
main(int argc, char *argv[])
{
printf("First address past:
");
printf(" program text (etext) %10p
", &etext);
printf(" initialized data (edata) %10p
", &edata);
printf(" uninitialized data (end) %10p
", &end);
exit(EXIT_SUCCESS);
}
SEE ALSO objdump(1), readelf(1), sbrk(2), elf(5)COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2008-07-17 END(3)